It was World Vomit Day yesterday, when Mackenzine Phillips felt the need to tell the world that she had an incestuous relationship with her father, Mammas and Pappas founder, John Phillips for 10 years. Now, John Phillips’ third wife, Mammas and Pappas singer and mother of Chynna Phillips, Michelle Phillips, has called bullshit. The Hollywood Reporter says:

Michelle Phillips, the ex-wife of the late John Phillips, says her stepdaughter Mackenzie Phillips is lying about having an incestuous affair with her father. I spoke to Michelle this morning by phone; she has not read Mackenzie’s book, published today, called “High on Arrival.” Michelle Phillips says that in 1997, Mackenzie told everyone in their extended family that she and her father, Michelle’s famous former husband, had had a sexual relationship. “She told me, then she called me back and said, ‘You know I’m joking,’ ” Michelle told me. “I said it wasn’t funny. Mackenzie said, ‘I guess we have different senses of humor.’ ”Michelle Phillips responded, when I read her that: “She’s really protecting his legacy now, isn’t she?” It’s not like Michelle Phillips hasn’t been critical of John in the past. She told me: “John was a bad parent, and a drug addict. But [expletive deleted] his daughter? If she thinks it’s true, why isn’t she with a good psychiatrist on a couch? I think it’s unconscionable that Oprah would let her do her show. I have every reason to believe it’s untrue. Oprah should be more judicious about who she has on her show.” Michelle added: “Mackenzie has a lot of mental illness. She’s had a needle stuck up her arm for 35 years. She was arrested for heroin and coke just recently. She did ‘Celebrity Rehab’ and now she writes a book. The whole thing is timed.” Michelle said it’s particularly ironic since her own daughter, Chynna, of Wilson Phillips fame, Mackenzie’s half sister, is releasing a new album this week. “Mackenzie is jealous of her siblings, who have accomplished a lot and did not become drug addicts.”

Um, wow. I have no idea who’s telling the truth. Mostly because I don’t care. But I think I speak for everyone when I say, “CATFIGHT!!”